Windows 10, 8, and RT

Hi guys... I'm just starting with Windows 8/Metro... I'm trying to figure out how to get a list of drives on the machine. The MSDN says Environment.GetLogicalDrives should work or System.IO.Directory.GetLogicalDrives but I can't seem to find either. I assume the framework for Metro apps is limited similar to how Silverlight is a subset of the .Net libraries... Anyone have any idea how to do this?